// Called by the framework when an item (file) needs to be updated.
public override void UpdateItem(object itemData, IEnumerable<SyncId> changeUnitsToUpdate, ItemFieldDictionary keyAndExpectedVersion,
RecoverableErrorReportingContext recoverableErrorReportingContext, out ItemFieldDictionary keyAndUpdatedVersion,
out bool commitKnowledgeAfterThisItem)
{
keyAndUpdatedVersion = null;
commitKnowledgeAfterThisItem = false;
var dataRetriever = (IFileDataRetriever) itemData;
IDictionary<uint, ItemField> expectedFields = keyAndExpectedVersion;
var expectedLastUpdate = DateTime.FromBinary((long) (ulong) expectedFields[ItemFields.CustomFieldTimestamp].Value);
var oldName = (string) expectedFields[ItemFields.CustomFieldName].Value;
try {
Stream dataStream = null;
if (!dataRetriever.FileData.IsDirectory) {
dataStream = dataRetriever.FileStream;
}
var newName = CreateNewName(dataRetriever.FileData);
SyncedBlobAttributes attrs;
if (IsMoveOrRename(oldName, newName)) {
var args = new ApplyingBlobEventArgs(ChangeType.Rename, oldName, newName);
var applyingDelegate = ApplyingChange;
applyingDelegate(this, args);
// Handle moves and renames as a delete and create.
DataStore.DeleteFile(oldName, expectedLastUpdate);
attrs = DataStore.InsertFile(dataRetriever.FileData, dataRetriever.RelativeDirectoryPath, dataStream);
}
else {
var args = new ApplyingBlobEventArgs(ChangeType.Update, dataRetriever.FileData.Name);
var applyingDelegate = ApplyingChange;
applyingDelegate(this, args);
attrs = DataStore.UpdateFile(oldName, dataRetriever.FileData, dataRetriever.RelativeDirectoryPath, dataStream,
expectedLastUpdate);
}
// Record new data after update.
keyAndUpdatedVersion = new ItemFieldDictionary();
keyAndUpdatedVersion.Add(new ItemField(ItemFields.CustomFieldName, typeof (string), attrs._name));
keyAndUpdatedVersion.Add(new ItemField(ItemFields.CustomFieldTimestamp, typeof (ulong),
(ulong) attrs._lastModifiedTime.ToBinary()));
}
catch (ApplicationException e) {
recoverableErrorReportingContext.RecordRecoverableErrorForChange(new RecoverableErrorData(e));
}
}
// Called by the framework when an item needs to be deleted.
public override void DeleteItem(ItemFieldDictionary keyAndExpectedVersion,
RecoverableErrorReportingContext recoverableErrorReportingContext, out bool commitKnowledgeAfterThisItem)
{
commitKnowledgeAfterThisItem = false;
IDictionary<uint, ItemField> expectedFields = keyAndExpectedVersion;
var name = (string) expectedFields[ItemFields.CustomFieldName].Value;
var args = new ApplyingBlobEventArgs(ChangeType.Delete, name);
var applyingDelegate = ApplyingChange;
applyingDelegate(this, args);
var expectedLastUpdate = DateTime.FromBinary((long) (ulong) expectedFields[ItemFields.CustomFieldTimestamp].Value);
try {
DataStore.DeleteFile(name, expectedLastUpdate);
}
catch (ApplicationException e) {
recoverableErrorReportingContext.RecordRecoverableErrorForChange(new RecoverableErrorData(e));
}
}
// Called by the framework when an item (file) needs to be added to the store.
public override void InsertItem(object itemData, IEnumerable<SyncId> changeUnitsToCreate,
RecoverableErrorReportingContext recoverableErrorReportingContext, out ItemFieldDictionary keyAndUpdatedVersion,
out bool commitKnowledgeAfterThisItem)
{
var dataRetriever = (IFileDataRetriever) itemData;
var relativePath = dataRetriever.RelativeDirectoryPath;
keyAndUpdatedVersion = null;
commitKnowledgeAfterThisItem = false;
var args = new ApplyingBlobEventArgs(ChangeType.Create, dataRetriever.FileData.Name);
ApplyingChange(this, args);
try {
Stream dataStream = null;
if (!dataRetriever.FileData.IsDirectory) {
dataStream = dataRetriever.FileStream;
}
var attrs = DataStore.InsertFile(dataRetriever.FileData, dataRetriever.RelativeDirectoryPath, dataStream);
keyAndUpdatedVersion = new ItemFieldDictionary();
keyAndUpdatedVersion.Add(new ItemField(ItemFields.CustomFieldName, typeof (string), attrs._name));
keyAndUpdatedVersion.Add(new ItemField(ItemFields.CustomFieldTimestamp, typeof (ulong),
(ulong) attrs._lastModifiedTime.ToBinary()));
}
catch (ApplicationException e) {
recoverableErrorReportingContext.RecordRecoverableErrorForChange(new RecoverableErrorData(e));
}
}
private void ApplyinRemoteChange(object sender, ApplyingBlobEventArgs args)
{
switch (args.ChangeType) {
case ChangeType.Create:
Console.WriteLine("Creating Azure file: {0}...", args.CurrentBlobName);
break;
case ChangeType.Delete:
Console.WriteLine("Deleting Azure file: {0}...", args.CurrentBlobName);
break;
case ChangeType.Rename:
Console.WriteLine("Renaming Azure file: {0} to {1}...", args.CurrentBlobName, args.NewBlobName);
break;
case ChangeType.Update:
Console.WriteLine("Updating Azure file: {0}...", args.CurrentBlobName);
break;
}
}
